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{-# OPTIONS_GHC -Wincomplete-patterns -fforce-recomp #-}
{-# LANGUAGE OverloadedLists #-}
{-# LANGUAGE PatternSynonyms #-}
{-# LANGUAGE GeneralisedNewtypeDeriving #-}
module T11822 where
import Data.Sequence (Seq, pattern (:<|))
import Data.Set (Set)
newtype SiblingDependencies = SiblingDependencies Int
deriving (Eq, Ord, Enum, Integral, Real, Num)
newtype Depth = Depth Int
deriving (Eq, Ord, Enum, Integral, Real, Num)
data TreeNode prefix
= OnlyChild prefix
| LeafLast prefix
| LeafMid prefix
| NodeLast prefix
| NodeMid prefix
| PrefixedLast prefix (Seq SiblingDependencies) (Set prefix) Depth
| PrefixedMid prefix (Seq SiblingDependencies) (Set prefix) Depth
mkTreeNode
:: Ord prefix
=> prefix
-> Seq SiblingDependencies
-> Set prefix
-> Depth
-> TreeNode prefix
mkTreeNode t [] _ _ = OnlyChild t
mkTreeNode t [0] [] _ = LeafLast t
mkTreeNode t [_] [] _ = LeafMid t
mkTreeNode t [0] _ 0 = LeafLast t
mkTreeNode t [_] _ 0 = LeafMid t
mkTreeNode t [0] _ _ = NodeLast t
mkTreeNode t [_] _ _ = NodeMid t
mkTreeNode t (0 :<| ns) ds depth = PrefixedLast t ns ds depth
mkTreeNode t (_ :<| ns) ds depth = PrefixedMid t ns ds depth
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